1、For语句实现
Private Sub Command1_Click()
Dim s As Long, n As Integer, i As Integer
n = Val(Text1.Text)
s = 1
For i = 1 To n
s = s * i
Next i
Label4.Caption = Str(s)
End Sub
2、Do While语句实现
Private Sub Command1_Click()
Dim s As Long, n As Integer, i As Integer
n = Val(Text1.Text)
s = 1
i = 1
Do While i <= n
s = s * i
i = i + 1
Loop
Label4.Caption = Str(s)
End Sub
扩展资料：
1~10的阶乘的结果如下：
1!=1
2!=2*1=2
3!=3*2*1=6
4!=4*3*2*1=24
5!=5*4*3*2*1=120
6!=6*5*4*3*2*1=720
7!=7*6*5*4*3*2*1=5040
8!=8*7*6*5*4*3*2*1=40320
9!=9*8*7*6*5*4*3*2*1=362880
10!=10*9*8*7*6*5*4*3*2*1=3628800
